Obsessive-Compulsive Disorder (OCD) is a chronic mental health condition characterized by recurring, intrusive thoughts (obsessions) and repetitive behaviors or mental acts (compulsions) performed to alleviate the distress caused by these thoughts. The obsessions are often irrational fears, such as fear of contamination, harm, or unwanted aggressive or sexual thoughts, while the compulsions might involve repetitive cleaning, checking, counting, or arranging objects. These behaviors, although intended to reduce anxiety, can significantly interfere with daily functioning and quality of life. OCD is believed to result from a combination of genetic, neurological, and environmental factors. Treatment typically includes cognitive-behavioral therapy (especially exposure and response prevention), medications like selective serotonin reuptake inhibitors (SSRIs), and sometimes other therapies to help manage symptoms and improve overall functioning.